Start/Stop button in stopwatch is animating poorly

Bug: 10656637

To get the poor animation to stop, also had to put spacers in the portrait layout.
In the end it is better that portrait and landscape transitions are effected identically.

Change-Id: Ic79b6bdef6dfe5fae02cde3eb8f88893978ef1aa
(cherry picked from commit 491d4782)